Electronic ballast



FIG. 1 is a perspective view of the electronic ballast showing my new design;

FIG. 2 is a left view thereof.

FIG. 3 is a right view thereof.

FIG. 4 is a top view thereof.

FIG. 5 is a bottom view thereof.

FIG. 6 is a front view thereof; and,

FIG. 7 is a rear view thereof.

The broken lines in the drawings illustrate portions of the electronic ballast which form no part of the claimed design. 

CLAIM The ornamental design for an electronic ballast, as shown and described. 